We bought the aerial tramway from Carnival -- it's worth it for a nice view and pictures. We went up first thing in the morning and once more around 4p. We took a taxi over to Bluebeards cove next to the Marriot Frenchman's reef. They have kayaks and we rented a tandem for $15 an hour. Saw two very large iguanas on that beach! Getting back was a bit of a wait for a cab so arrange for your driver to come back and pick you up. Also, there is a liquor store across from the ship that sells good orange juice -- we bought three bottles and brought them back. The orange juice on the ship tastes like watered down Tang.
We took at cab to the downtown and managed to stretch that out to one hour -- spending half the time at a cathedral and cemetery which was pretty interesting. There isn't a lot to do here unless you are into shopping at all the 'name' jewelry stores. We caught a cab to the Hilton in Carlisle bay. If you go to the left of the Hilton property the sea has lots of big waves and surf. There was a volunteer digging up recent turtle eggs to release them at night when they have a better chance of making it out to sea alive -- he was informative and interesting to talk to.
If you go to the right of the Hilton property the sea is extremely calm and very relaxing. We had a great fish sandwich here where all the taxi drivers hung out.
Either way -- there is not a lot of shade -- we brought our own little tent. On the calm beach there are trees just before the sand starts so you could spread your towel there if you sunburn like I do.
They will stamp your passport at the port -- just ask at customs.
We signed up in advance directly with Treetop adventures for the zip-lining. We paid $65 each which included transport to and from the ship. Nice air-conditioned bus to the park which is about 40 minutes each way. This was an absolute blast!!!!
We dove with Dive St. Kitts (booked directly with them) They were very nice to work with, new gear, saw great coral fans, pinnacles and lots of small fish. It's so close you'll return to shore for your surface interval.
We did our own version of the ships 'butterfly' tour. We paid $14 (for 2)for a cab to the Butterfly Farm, $26 (for 2) for admission. The nice people at the butterfly farm called a cab for us to get to the fort just above Marigot ($20 for 2) He drove us as far up the hill as he could and we walked the rest of the way to Fort Louis. It's free admission and you get a great view of the whole harbor and entire side of the island. We walked down the hill and walked around Marigot and caught a cab back to the ship ($20 for 2). We spent $2 more than the ship but got to spend as much time as we wanted at each place -- rather than being herded with 37 people and moving at the slowest person's speed.